Vulnerability Name:

CVE-2021-23992 (CCN-199672)

Assigned:2021-04-08
Published:2021-04-08
Updated:2021-07-08
Summary:Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may falsely conclude that the false user ID belongs to the correspondent. This vulnerability affects Thunderbird < 78.9.1.
CVSS v3 Severity:4.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)
3.8 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
4.3 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
3.8 Low (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-347
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-23992

Source: MISC
Type: Issue Tracking, Permissions Required, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1666236

Source: XF
Type: UNKNOWN
thunderbird-cve202123992-sec-bypass(199672)

Source: CCN
Type: Mozilla Foundation Security Advisory 2021-13
Security Vulnerabilities fixed in Thunderbird 78.9.1

Source: MISC
Type: Release Notes, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-13/

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-23992

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mozilla:thunderbird:*:*:*:*:*:*:*:* (Version < 78.9.1)

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 6:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:mozilla:thunderbird:78.9.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:111330
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-19
    oval:com.redhat.rhsa:def:20211192
    P
    		RHSA-2021:1192: thunderbird security update (Moderate)
    2021-04-14
    oval:com.redhat.rhsa:def:20211193
    P
    		RHSA-2021:1193: thunderbird security update (Moderate)
    2021-04-14
    oval:org.opensuse.security:def:96296
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:109634
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:102968
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:10634
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:119774
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:96841
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:70774
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    BACK
    mozilla thunderbird *
    mozilla thunderbird 78.9.0